294993

Sigma-Aldrich

Ammonia

greener alternative

anhydrous, ≥99.98%

Linear Formula:
NH3
CAS Number:
Molecular Weight:
17.03
Beilstein/REAXYS Number:
3587154
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Quality Level

grade

anhydrous

vapor density

0.6 (vs air)

vapor pressure

8.75 atm ( 21 °C)

assay

≥99.98%

form

liquefied gas

autoignition temp.

1203 °F

expl. lim.

25 %

greener alternative product characteristics

Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.

pH

~10-12 (20 °C, 50 g/L)

pKa (25 °C)

9.25

bp

−33 °C (lit.)

mp

−78 °C (lit.)

solubility

water: 531 g/L at 20 °C

density

0.7 g/cm3 at -33 °C

greener alternative category

Enabling

SMILES string

N

InChI

1S/H3N/h1H3

InChI key

QGZKDVFQNNGYKY-UHFFFAOYSA-N

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General description

We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for energy efficiency. Find details here.

Application

Ammonia may be used as a base to adjust pH for preparing mixed magnetite-hematite nanoparticles via combustion method. These nanoparticles show promising potential as sorbents for removing heavy metal ions from water.
Anhydrous ammonia has been used in dynamic reaction cell technology (DRC) to remove interfering ions without the loss of sensitivity. It has also been used for adjusting pH during the synthesis of magnetite-hematite mixture by combustion methods.
Reagent for chemical vapor deposition of TiN.

Packaging

170 g in steel cylinder

Other Notes

For 294993-230G-EU packaging: 500 mL of aluminium cylinder equipped with stainless steel valve.

Recommended products

  • For 294993-170G: Use either Z148504 or Z148512 CGA 180 Regulators, OR Z146943 CGA 110 Valve, with Z147095 CGA 110 to CGA 180 adapter and Z146986 washer.
  • For 294993-230G-EU: outlet fitting: DIN 477-1 no. 1, Z742162 or Z742164 are the recommended regulators.

signalword

Danger

hazcat

Acute Tox. 3 Inhalation - Aquatic Acute 1 - Aquatic Chronic 2 - Eye Dam. 1 - Press. Gas Liquefied gas - Skin Corr. 1B

Supp Hazards

EUH071

storage_class_code

2A - Gases

WGK Germany

WGK 2

Flash Point F

Not applicable

Flash Point C

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

Assessment of serum trace elements and electrolytes in children with childhood and atypical autism.
Skalny AV, et al.
Journal of Trace Elements in Medicine and Biology, 43, 9-14 (2017)
Weiller, B.H.
Journal of the American Chemical Society, 118, 4975-4975 (1996)
Magnetite?hematite nanoparticles prepared by green methods for heavy metal ions removal from water.
Ahmed MA, et al.
Materials Science and Engineering, B, 178(10), 744-751 (2013)
Serum copper, zinc, and iron levels, and markers of carbohydrate metabolism in postmenopausal women with prediabetes and type 2 diabetes mellitus.
Skalnaya MG, et al.
Journal of Trace Elements in Medicine and Biology, 43, 46-51 (2017)
Marion Vallet et al.
Kidney international, 88(1), 137-145 (2015-03-12)
Recent studies suggest that alkalinizing treatments improve the course of chronic kidney disease (CKD), even in patients without overt metabolic acidosis. Here, we tested whether a decreased ability in excreting urinary acid rather than overt metabolic acidosis may be deleterious...
Articles
Atomic layer deposition (ALD) techniques have emerged in the last ten years to meet various needs including semiconductor device miniaturization, conformal deposition on porous structures and coating of nanoparticles. ALD is based on two sequential self-limiting surface reactions.
Read More

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